Citation: Ce Fu, Tong-xian Zhang, Cheng-qi Ji, Fa Cheng, Wen-zhu Cui, Yu Chen. Optimizing Heavy-duty Anticorrosive Performances of Coating Films Formed by Acrylate-vinylidene Chloride Copolymer Latexes through Twice-painting Technique[J]. Chinese Journal of Polymer Science, ;2015, 33(1): 14-22. doi: 10.1007/s10118-015-1570-x shu

Optimizing Heavy-duty Anticorrosive Performances of Coating Films Formed by Acrylate-vinylidene Chloride Copolymer Latexes through Twice-painting Technique

Ce Fu ¹ ,
Tong-xian Zhang ¹ ,
Cheng-qi Ji ² ,
Fa Cheng ¹ ,
Wen-zhu Cui ³ ,
Yu Chen ^1,,

1.
Department of Chemistry, School of Sciences, Tianjin University, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
2.
Jin Tian New Material Co., Ltd., Tianjin 300480, China
3.
COSCO Kansai Paint &

Corresponding author: Yu Chen, chentangyu@yahoo.com
Received Date: 10 February 2014
Revised Date: 11 June 2014

Fund Project: This work was financially supported by the Program for New Century Excellent Talents in Universities, and the National Natural Science Foundation of China (No. 21074088).

Twice-painting technique was adopted to prepare heavy-duty anticorrosive coating films formed by aqueous latexes of copolymers of vinylidene chloride (VDC) with an acrylate, namely methyl acrylate (MA), ethyl acrylate (EA), butyl acrylate (BA) or 2-ethylhexyl acrylate (EHA). Harsh salt-spray corrosion tests demonstrated that the optimized twice-painting technique was that the acidic latex solution was adjusted to pH 5-6 for the first painting, while it was utilized directly for the second painting. The test of 600 h of harsh salt-spray corrosion showed that MA-VDC85 coating could protect the steel excellently, whereas the other acrylate-VDC coatings with 75%-90% VDC content could not protect the steel so effectively. Further corrosion test showed that (1) MA-VDC85 coating protected steel from loss of metallic luster for at least 1000 h of salt-spray corrosion; (2) adhesion of MA-VDC85 coating to steel was excellent for at least 800 h of salt-spray corrosion, but became very poor after 1000 h. Differential scanning calorimetry, thermogravimetric analysis, X-ray photoelectron spectroscopy and Fourier-transform infrared spectroscopy were used to evaluate the corroded MA-VDC85 film.
- Anticorrosion,
- Coatings,
- Vinylidene chloride,
- Emulsion polymerization,
- Acrylates
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沈阳化工大学材料科学与工程学院沈阳 110142